Argon 18Nitrogen
The lower-priced version of Argon 18's relaunched Nitrogen aero race bike. It shares the Nitrogen Pro's frame shape, geometry, one-piece ATTEN CHB-01 cockpit and T47 / UDH frame standards, but uses the brand's 'Elite' carbon layup and simpler parts: Scope R6.A wheels on the Force and Ultegra builds, ATTEN L42 wheels on the 105 Di2 build, and Enduro headset bearings in place of CeramicSpeed.
- From
- $8,599$8,599$8,599
- Builds
- 3
- Sizes
- 6
- Frame weight
- —
Our verdict
Overall
out of 100, average of 6 categories
Most of the Nitrogen Pro's aero package for considerably less: the same frame shape, geometry and one-piece cockpit, with 65 mm Scope wheels on the Force and Ultegra builds and a power meter on the Force. Argon 18 publishes no weight or aero figures for this layup, and the 105 Di2 build's shallower L42 wheels give away some of the speed.
Scored Nov 2026
- + Aero-first design
- + Affordable way in
- + Premium frame
AI-drafted from the specs on this page and reviewed before publishing. Scores are relative to every bike in the catalog when they were given, so they drop as newer bikes and parts raise the bar.
- Aero
- 88/100
- Frame
- 80/100
- Components
- 80/100
- Fit
- 80/100
- Practicality
- 72/100
- Price
- 84/100
Aero claims and front-end integration
Carbon grade, weight and warranty
Groupset, wheels and power meter
Sizes and adjustment range
Travel, standard parts, servicing
From the cheapest complete-bike MSRP
Bike duel
Frame & platform
Frame & fork
- Frame material
- Carbon (Nitrogen 'Elite' layup)
- Fork material
- Carbon
- Frame sizes
- XXS, XS, S, M, L, XL
- Colours
- Harvest Moon, Cosmic Teal
- Also available as
- Nitrogen Pro, the higher carbon layup of the same platform
Compatibility & standards
- Brake type
- Hydraulic disc
- Max rotor size
- 160 mm
- Max tire width
- 32 mm
- Bottom bracket standard
- T47 threaded, 85.5 mm shell
- Front axle
- 12 mm thru-axle (M12 x 1.5, 119 mm)
- Rear axle
- 12x142 mm thru-axle (M12 x 1.0, 167.5 mm)
- Drivetrain compatibility
- Electronic groupsets (the assembly guide covers wireless and wired routing only). 2x with 50-57T round chainrings (or oval of equivalent size); 1x up to 56T
- 1x compatible
- Yes
- Max chainring
- 57T
- Front derailleur mount
- Removable front derailleur hanger; plugs fill the holes for 1x
- Cable routing
- Fully internal
- Electronic battery location
- On the bottom bracket cover / battery holder
Bottles & storage
- Bottle mounts
- 2
- Bottle mount locations
- Down tube and seat tube, with the included ATTEN aero cages
Fit & adjustability
- Cockpit
- One-piece carbon bar and stem (ATTEN CHB-01 Aero)
- Standard stem and bar possible
- Yes
- Seatpost type
- Argon 18 Nitrogen aero carbon seatpost
Aerodynamics
- Manufacturer aero claims
- Argon 18's aero claims (24 W faster than the Sum Pro, CHB-01 cockpit and aero-cage savings) were published for the Nitrogen Pro; it doesn't publish separate figures for this layup
- Tube profile
- Truncated NACA-based profiles; off-axis head tube with the steerer set back from the leading edge; wide-stance fork; dropped seat stays
Travel, maintenance & warranty
- Headset bearings
- IST3 (Enduro 440C bearings on the complete bikes)
- Derailleur hanger
- UDH (SRAM Universal Derailleur Hanger), standard or direct-mount version
- Proprietary parts
- ATTEN CHB-01 cockpit, Nitrogen seatpost and clamp, BB cover/battery holder, thru-axles
- Sold via
- Through Argon 18 dealers
Photos
Builds & components
Highlighted rows differ between builds. Green marks the best value.
Nitrogen SRAM Force AXS | Nitrogen Shimano Ultegra Di2 | Nitrogen Shimano 105 Di2 | |
|---|---|---|---|
| Overview | |||
| Price (MSRP) | $8,599$8,599$8,599 | $7,799$7,799$7,799 | $5,999$5,999$5,999 |
| Type | Complete bike | Complete bike | Complete bike |
| Notes | Harvest Moon or Cosmic Teal. Argon 18 lists the crank as 'SRAM Force AXS Powermeter 48/35'. Only USD is listed; Argon 18's other regional stores redirect to the US site. | Cosmic Teal or Harvest Moon. Only USD is listed. | Harvest Moon or Cosmic Teal. Only USD is listed. |
| Drivetrain | |||
| Groupset | SRAM Force AXS E1 | Shimano Ultegra Di2 R8100 | Shimano 105 Di2 R7100 |
| Launched | 2025 · current generation | 2021 · current generation | 2022 · current generation |
| Speeds | 12-speed | 12-speed | 12-speed |
| Electronic | Yes | Yes | Yes |
| Wireless | Yes | — | — |
| Drivetrain | 2x | 2x | 2x |
| Shifters | SRAM Force AXS E1 | Shimano Ultegra Di2 ST-R8170 | Shimano 105 Di2 ST-R7170 |
| Crankset | SRAM Force AXS E1 Power Meter | Shimano Ultegra R8100 | Shimano 105 R7100 |
| Chainrings | 48/35 | 52/36 | 52/36 |
| Power meter | SRAM Force AXS E1 Power Meter | — | — |
| Launched | 2025 · current generation | — | — |
| Bottom bracket | SRAM T47 | Token T47 | Token T47 |
| Standard | T47 threaded | T47 threaded | T47 threaded |
| Notes | Listed by Argon 18 as 'T47 BB' without a brand | — | — |
| Front derailleur | SRAM Force AXS E1 | Shimano Ultegra Di2 R8150 | Shimano 105 Di2 R7150 |
| Rear derailleur | SRAM Force AXS E1 | Shimano Ultegra Di2 R8150 | Shimano 105 Di2 R7150 |
| Cassette | SRAM Force XG-1270 E1 | Shimano Ultegra R8100 | Shimano 105 R7100 |
| Range | 10-33 | 11-34 | 11-34 |
| Speeds | 12-speed | 12-speed | 12-speed |
| Chain | SRAM Force E1 | Shimano CN-M8100 | Shimano CN-M7100 |
| Brakes | |||
| Rotors | SRAM Paceline X | Shimano RT-CL800 | Shimano RT-CL700 |
| Front rotor | 160 mm | 160 mm | 160 mm |
| Rear rotor | 140 mm | 140 mm | 140 mm |
| Mount | Center Lock | Center Lock | Center Lock |
| Wheels & tires | |||
| Wheelset | Scope R6.A | Scope R6.A | Atten L42 |
| Front rim depth | 65 mm | 65 mm | 42 mm |
| Rear rim depth | 65 mm | 65 mm | 42 mm |
| Material | Carbon | Carbon | — |
| Tires | Vittoria Corsa N.EXT TLR | Vittoria Corsa N.EXT TLR | Vittoria Corsa N.EXT TLR |
| Tire width | 30 mm | 30 mm | 30 mm |
| Cockpit | |||
| Handlebar | ATTEN CHB-01 Aero | ATTEN CHB-01 Aero | ATTEN CHB-01 Aero |
| Type | One-piece carbon bar and stem | One-piece carbon bar and stem | One-piece carbon bar and stem |
| Integrated stem | Yes | Yes | Yes |
| Widths available | 360 or 380 mm, each with 80-130 mm stems (12 sizes) | 360 or 380 mm, each with 80-130 mm stems (12 sizes) | 360 or 380 mm, each with 80-130 mm stems (12 sizes) |
| Material | Carbon | Carbon | Carbon |
| Weight | 320 g11.3 oz | 320 g11.3 oz | 320 g11.3 oz |
| Notes | Stock size by frame: 360 x 80 (XXS), 360 x 90 (XS-S), 380 x 100 (M), 380 x 110 (L), 380 x 120 (XL). Integrated computer mount with Garmin and Wahoo inserts and 3-12° tilt shims. Weight for 380 x 100 mm. | Stock size by frame: 360 x 80 (XXS), 360 x 90 (XS-S), 380 x 100 (M), 380 x 110 (L), 380 x 120 (XL). Integrated computer mount with Garmin and Wahoo inserts and 3-12° tilt shims. Weight for 380 x 100 mm. | Stock size by frame: 360 x 80 (XXS), 360 x 90 (XS-S), 380 x 100 (M), 380 x 110 (L), 380 x 120 (XL). Integrated computer mount with Garmin and Wahoo inserts and 3-12° tilt shims. Weight for 380 x 100 mm. |
| Headset | Enduro 440C (IST3) | Enduro 440C (IST3) | Enduro 440C (IST3) |
| Saddle & seatpost | |||
| Saddle | Repente Quasar 2.0 | Repente Quasar 2.0 | Repente Quasar S |
| Seatpost | Argon 18 Nitrogen | Argon 18 Nitrogen | Argon 18 Nitrogen |
| Material | Carbon | Carbon | Carbon |
| Bar tape | Ciclovation Leather Touch Tornado Gloss | Ciclovation Leather Touch Tornado Gloss | Ciclovation Leather Touch Tornado Gloss |
Ownership checklist
3 of 3 known checks pass, 1 not published by Argon 18. Why these checks
- ✓
Threaded bottom bracket
T47 threaded, 85.5 mm shell
- ✓
UDH derailleur hanger
UDH (SRAM Universal Derailleur Hanger), standard or direct-mount version
- ✓
Standard 12×142 mm rear axle
12x142 mm thru-axle (M12 x 1.0, 167.5 mm)
- ?
Works with mechanical shifting
Nitrogen geometry
The manufacturer uses the same geometry as the Pro (2025).
| XXS | XS | S | M | L | XL | |
|---|---|---|---|---|---|---|
| Stack | 486 mm19.1″ | 508 mm20″ | 531 mm20.9″ | 555 mm21.9″ | 580 mm22.8″ | 607 mm23.9″ |
| Reach | 370 mm14.6″ | 377 mm14.8″ | 384 mm15.1″ | 392 mm15.4″ | 400 mm15.7″ | 409 mm16.1″ |
| Seat tube angle | 75° | 74.5° | 74° | 73.5° | 73° | 72.5° |
| Head tube angle | 71.2° | 72.1° | 72.7° | 72.7° | 72.7° | 73° |
| Head tube length | 81 mm3.2″ | 97 mm3.8″ | 113 mm4.4″ | 138 mm5.4″ | 165 mm6.5″ | 192 mm7.6″ |
| Effective top tube | 502 mm19.8″ | 519 mm20.4″ | 537 mm21.1″ | 557 mm21.9″ | 578 mm22.8″ | 601 mm23.7″ |
| Seat tube length | 395 mm15.6″ | 425 mm16.7″ | 460 mm18.1″ | 505 mm19.9″ | 550 mm21.7″ | 595 mm23.4″ |
| Chainstay | 410 mm16.1″ | 410 mm16.1″ | 410 mm16.1″ | 410 mm16.1″ | 410 mm16.1″ | 410 mm16.1″ |
| Wheelbase | 967 mm38.1″ | 972 mm38.3″ | 975 mm38.4″ | 990 mm39″ | 1,006 mm39.6″ | 1,020 mm40.2″ |
| BB drop | 71 mm2.8″ | 75 mm3″ | 79 mm3.1″ | 79 mm3.1″ | 79 mm3.1″ | 79 mm3.1″ |
| Fork length | 376 mm14.8″ | 376 mm14.8″ | 376 mm14.8″ | 376 mm14.8″ | 376 mm14.8″ | 376 mm14.8″ |
| Fork offset | 49 mm1.9″ | 49 mm1.9″ | 45 mm1.8″ | 45 mm1.8″ | 45 mm1.8″ | 45 mm1.8″ |
| Standover | 682 mm26.9″ | 706 mm27.8″ | 734 mm28.9″ | 772 mm30.4″ | 810 mm31.9″ | 848 mm33.4″ |
| Saddle height min | 565 mm22.2″ | 595 mm23.4″ | 630 mm24.8″ | 675 mm26.6″ | 720 mm28.3″ | 765 mm30.1″ |
| Saddle height max | 715 mm28.1″ | 745 mm29.3″ | 780 mm30.7″ | 825 mm32.5″ | 870 mm34.3″ | 915 mm36″ |
| Crank length | 165 mm6.5″ | 165 mm6.5″ | 170 mm6.7″ | 170 mm6.7″ | 172.5 mm6.8″ | 172.5 mm6.8″ |
| Stem length | 80 mm3.1″ | 90 mm3.5″ | 90 mm3.5″ | 100 mm3.9″ | 110 mm4.3″ | 120 mm4.7″ |
| Handlebar width | 360 mm14.2″ | 360 mm14.2″ | 360 mm14.2″ | 380 mm15″ | 380 mm15″ | 380 mm15″ |
Side view
Drawn to scale (how to read it).
How the geometry rides
The Nitrogen in size S against the middle size of 66 other bikes: tendencies from geometry, not a ride review (how to read this).
- Wheelbase975 mm38.4″
shortestlonger than 5% of 66 bikeslongest
Short wheelbase: tends to feel more agile in corners and less planted on long straights.
- Chainstay410 mm16.1″
shortestlonger than 63% of 74 bikeslongest
Good to know
Fit
Argon 18's Nitrogen product pages publish the same geometry chart, number for number, as the Nitrogen Pro (six sizes, XXS to XL), so the geometry here is taken from the Pro file.
SourceCompatibility
Argon 18 lists tyre clearance of 32c (34 mm measured) on the Nitrogen pages; all three builds ship on 30 mm Vittoria Corsa N.EXT TLR tyres. One assembly guide covers both layups.
SourceVersions
The 2025 Nitrogen platform comes in two carbon layups, three colours and six builds: the Nitrogen Pro (Aurora Charcoal; Red, Dura-Ace Di2 and Ultegra Di2) and this Nitrogen (Harvest Moon or Cosmic Teal; Force AXS, Ultegra Di2 and 105 Di2). Argon 18 calls the Nitrogen's layup its 'Elite' level.
Source
Nitrogen FAQ
How much does the Argon 18 Nitrogen cost?+
Manufacturer prices (MSRP): $5,999–$8,599 across 3 listed builds and framesets: Nitrogen SRAM Force AXS, Nitrogen Shimano Ultegra Di2 and Nitrogen Shimano 105 Di2.
What sizes does the Argon 18 Nitrogen come in?+
6 sizes: XXS, XS, S, M, L and XL.
What is the tire clearance of the Argon 18 Nitrogen?+
Up to 32 mm tires.
Which groupsets are compatible with the Argon 18 Nitrogen?+
Drivetrain compatibility: Electronic groupsets (the assembly guide covers wireless and wired routing only). 2x with 50-57T round chainrings (or oval of equivalent size); 1x up to 56T. 1x drivetrains are supported. The largest chainring that fits is 57T. Bottom bracket: T47 threaded, 85.5 mm shell.
What builds of the Argon 18 Nitrogen are available?+
Nitrogen SRAM Force AXS: SRAM Force AXS E1; Nitrogen Shimano Ultegra Di2: Shimano Ultegra Di2 R8100; Nitrogen Shimano 105 Di2: Shimano 105 Di2 R7100.
Is the Argon 18 Nitrogen aerodynamic?+
Argon 18's aero claims (24 W faster than the Sum Pro, CHB-01 cockpit and aero-cage savings) were published for the Nitrogen Pro; it doesn't publish separate figures for this layup
Sources
- https://www.argon18.com/en-us/bikes/road/nitrogen
- https://www.argon18.com/en-us/bikes/road/nitrogen/nitrogen-force-axs
- https://www.argon18.com/en-us/bikes/road/nitrogen/nitrogen-shimano-ultegra-di2
- https://www.argon18.com/en-us/bikes/road/nitrogen/nitrogen-shimano-105-di2
- https://www.argon18.com/en-us/stories/argon-18-launches-nitrogen-pro
- https://storage.googleapis.com/argon18craft/files/Assembly-Guides/2025/NITROGEN_NITROGEN-PRO_Assembly-Guide_383A_384A-B_2026-05-05.pdf
Argon 18 Nitrogen data last updated · How the data is checked ·